What are onions?
An onion is a type of vegetable. (1)
Allium cepa is a species of the Allium genus.
Allium cepa is also known as onion, bulb onion, or common onion. (2)
What do onions contain?
flavonols (1)
What are varieties of Allium cepa?
The shallot is a botanical variety of the onion which was classified as a separate species until 2011. (2)
Resources
1. https://www.webmd.com/diet/foods-high-in-flavonoids
2. https://en.wikipedia.org/wiki/Onion
